# Signal GH — TV Signal Meter for HDHomerun

> HDHomerun OTA TV signal monitoring and optimization tool. (iPhone/iPad app by Generally Helpful Software.)

- Source: https://appshunter.io/ios/app/signal-gh/id289580769 (this page in markdown: same URL + `.md`)
- Developer: [Generally Helpful Software](https://appshunter.io/developer/286015711)
- Category: Utilities, Entertainment
- Price: $2.99
- Rating: 4.60/5 from 539 App Store ratings · 88 written reviews indexed
- Age rating: 4+
- Requires: iOS 16.0 · 10 MB
- Languages: American English
- Released: 2019-02-14
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/signal-gh/id289580769/reviews.md

## What is Signal GH?

Signal GH is a tool for users of the HDHomerun networked digital TV tuner who want to monitor and improve their Over The Air (OTA) reception quality. It graphs signal quality from multiple channels simultaneously, allowing a user to more rapidly adjust and upgrade OTA receiving hardware, i.e., cables, connections, splitters, pre-amps, and antennas.  

Snapshot the state of your system using the Experiments tab to keep track of what worked and what didn't work. 

United States users also have the benefit of a map of digital television broadcasting towers. Depends on the accuracy of your device's compass. 

If you don't have an HDHomerun, you don't need this product. If you do have an HDHomerun, and use it for over the air reception, you will likely find it useful. 

If the automatic scan does not find a station you expect, tap on the station's real digital channel in the unused channel column under Settings.

Signal GH does not support QAM (digital cable) Please make sure your HDHomerun is set to use a broadcasting channel set and not a cable channel set.

You cannot use this software to watch video on your iOS device. This is a diagnostic tool.

## Key features

- Monitor OTA signal quality
- Graph multiple channels simultaneously
- Adjust and upgrade receiving hardware
- Snapshot system states for experiments
- Broadcast tower map (US users)
- Manual channel tuning

## Chart rankings

- #177 in Top Paid · Utilities (US App Store)

## What do users think of Signal GH?

Overall sentiment: positive

**Pros**

- 🚀 Helpful for antenna positioning
- 👍 Provides real-time signal data
- 💡 Useful map and compass features
- 🔧 Troubleshoots signal issues
- ⏱️ Saves time adjusting antenna

**Cons**

- 🐛 Crashes and freezes
- 🤔 Confusing or unintuitive UI
- 🔍 Doesn't detect all channels
- 🚫 Requires HDHomeRun device
- ⚠️ Issues with ATSC 3.0 support

**Commonly reported bugs**

- Scanning stops with no channels found
- Incorrect channel numbers and frequencies
- Tuner locking issues with other apps

**Most requested features**

- Option to keep screen on during use
- Ability to select individual virtual channels
- Increase signal polling frequency and history
- Add more visual indicators for signal quality

## Recent user reviews (10 of 88)

All indexed reviews: https://appshunter.io/ios/app/signal-gh/id289580769/reviews.md

### 1/5 — No longer works

*2026-07-02, version 3.0.8*

I’m having a problem with the app connecting to a HDHR Quatro. It used to work, but no longer does. It sees the HDHR, but won’t do a scan and quickly disconnects. There are no issues connecting to it via its web page or Plex. The problem exists using this app on iPhone, iPad, and AppleTV. Unfortunately there is contact information for developer support. Disappointed.

### 5/5 — Incredibly useful

*2026-06-19*

I had been grinding through optimization of my antenna setup using spreadsheets and hdhomerun_config when I discovered this app. Wow! Incredibly comprehensive data represented visually in real time. The ideal tool for what I want to do at a very reasonable price. Great app. Highly recommended!

### 5/5 — Superb diagnostic tool

*2026-06-12*

I rarely spend the time to write a review, but this is the app that convinced me to spend the time. I was trying to use the HDHomeRun-supplied tools to tune the antenna and test reception and just found it totally inadequate. I read some online forms of people having similar issues and they recommended this software. I couldn’t be happier. It gave me everything that I needed in a quick simple easy to use interface that I needed to optimize my reception

### 3/5 — What happened to Canadian Channels?

*2026-06-08, version 3.0.8*

First off I love this app. 
I use it all the time to check my signal strength for my OTA antenna, but when I first got it the map showed Canadian stations so I was able to use it to point my antenna better. Now, after the last update (I want to say) the Canadian stations aren’t on the map. This is a feature that I hope comes back. Had to knock of a star for that.

### 5/5 — Excellent tool for “OTA TV Hobby”

*2026-03-21*

I joke about over-the-air TV being a hobby. Years back I had mixed luck and was constantly tinkering to improve marginal reception.

At his point tinkering is minimal and I’m lucky to have very good reception. This utility has been essential to getting my antenna optimized and signal stable.

One nit. My one ATSC 3 station seemingly takes a bit of time for my hdhr box to lock the signal. The experiments feature maybe samples a bit too short a time showing randomly 0% or 100% for a signal that in reality is a solid 100%. I bet increasing the experiments sample time a bit would eliminate this false alarm.

### 1/5 — Unusable

*2026-02-12, version 3.0.8*

Completely non functional. Can’t detect HDHomerun unless IP manually entered. Then it promptly forgets it. If you do manage to get the scan to run it promptly freezes the app. Don’t waste your money. There is a reason there is no free trial.

### 5/5 — So handy!

*2025-08-16*

Does what it says on the tin. Hint: if you aren’t able to see your HDHR, make sure you granted Local Networks permission when it asked during startup.

I’ve used this to verify my setup is doing the best it can to cope with passing aircraft and to verify the cables and connectors are behaving themselves (with a shake test).

I have just a few minor suggestions that would make the app even better: 

* an option to keep the screen on in the graph view
* a “passive” mode so it only graphs what the tuners are actually doing (without turning on any tuners beyond what’s active)
* allowing tuners to be enabled and disabled for graphing right from the graph screen

Overall quite a time saver and well worth the price.

### 1/5 — Not able to Locate HDHomeRun

*2025-08-02, version 3.0.7*

Based in all the reviews I thought I found Gold!  Unfortunately the software can’t find my HDHomeRun 4k Flex - neither with auto discovery nor IP address.  The HDhomeRun app in my phone finds it just fine and I can stream channels.  Can’t find support to see how to fox - seems like I am out $2.99 - maybe this only supports older devices…

### 2/5 — Doesn’t support fractional channels, otherwise kind of works

*2025-07-05, version 3.0.7*

I have hd pbs on channel 2.1 (and many others like it) but it isn’t able to support/find them.

### 5/5 — WVEC Hampton, VA is UHF now

*2025-01-24, version 3.0.6*

This was a VHF station on ch. 11 (displayed as 13).  Now they are a UHF station on ch. 35.  Much better signal.

WVEC 35.1 - 35.8 (displays as 13.1 - 13.8).

Old FCC data is used in the app.

## Frequently asked questions about Signal GH

### What does Signal GH do?

Signal GH is a diagnostic tool designed for users of HDHomerun networked digital TV tuners. It helps monitor and improve Over The Air (OTA) reception quality by graphing signal strength from multiple channels simultaneously. This allows users to make informed adjustments to their antennas, cables, and other receiving hardware.

### What are the key features of Signal GH?

Key features include simultaneous graphing of signal quality from multiple channels, a system snapshot function to track experimental changes, and a map of digital television broadcasting towers for US users. It also allows for manual tuning of stations if automatic scans are unsuccessful.

### How much does Signal GH cost?

Based on the provided information, Signal GH is a paid application. It does not have in-app purchases or advertisements, indicating a one-time purchase model for access to its features.

### Is Signal GH compatible with all TV tuners?

No, Signal GH is specifically designed for users of HDHomerun networked digital TV tuners. It does not support QAM (digital cable) and requires the HDHomerun to be set to use broadcasting channels, not cable channels. If you do not have an HDHomerun, this app is not for you.

### Can I watch TV on my device with Signal GH?

No, Signal GH is strictly a diagnostic and monitoring tool. It cannot be used to watch video content on your iOS device. Its purpose is solely to help you analyze and optimize your OTA TV signal reception.

## Version history (last 5 releases)

### 3.0.8 — 2025-09-22

• Location button in map tab needed to be updated
• Updated the map data
• The tinted icon was not drawing as expected.

### 3.0.7 — 2025-02-09

• Large update to Map Database
• Minor text changes

### 3.0.6 — 2024-09-29

• Rebuilt TV database to support modern FCC database import
• Fixed some minor robustness bugs
• Added alternative tinted icon

### 3.0.5 — 2024-06-15

• User reported a crash while using the Experiments tab

### 3.0.4 — 2023-11-27

• Updated map to include ATSC 3 broadcasters
• Showing only tuners 0 and 1 as ATSC 3 capable, where applicable. 
• Layout changes in the settings and experiments tab

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## More apps by Generally Helpful Software

- [TV Towers USA](https://appshunter.io/ios/app/tv-towers-usa/id396342822)
- [FM Towers USA](https://appshunter.io/ios/app/fm-towers-usa/id589531562)
- [AM Towers USA](https://appshunter.io/ios/app/am-towers-usa/id593316820)
- [Chemistry Keyboard](https://appshunter.io/ios/app/chemistry-keyboard/id914964478)

All apps by Generally Helpful Software: https://appshunter.io/developer/286015711

## Related topics

[hdhomerun](https://appshunter.io/ios/topics/hdhomerun)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*